I'm fixing make to differentiate between host and target, so this will
be more useful soon.

Test: Android-aosp_arm64.mk is the same before/after
Test: adding `host_supported: true` to shell_and_utilities_system produces expected Android-aosp_arm64.mk
Change-Id: Idf12703be692100336db6d5c0ec05bb96e5e5c27

Add an empty DepsMutator to ModuleBase so it doesn't have to be
implemented on every module that doesn't need it.

Test: all soong tests
Change-Id: I545a832a0dbf27386d3080377a75ea482cd9ce59

When adding aidl_interface, the intention is to
have module name 'foo' create modules 'foo-cpp'
and 'foo-java' for consistency. I'm using a phony
module to reserve 'foo' as a name for future use
and also for sanity.

Bug: 111117220
Test: create a phony module using the factory and use it to build
Change-Id: Ib3214acb9b4bf48aa60a1a3c20b5d12129d1c3a6

Pass accumulated AndroidMkData to AndroidMkData.Custom handlers
and expose WriteAndroidMkData so that Custom handlers can write
out the normal make variables and then add their own.

Test: No change to out/soong/Android-aosp_sailfish.mk
Change-Id: Id9717132bbd6c5cf3af8596f3eaa9bbb05d98e40

It's never anything except nil, and it unnecessarily complicates
the implementations.

Test: m -j checkbuild
Change-Id: I3e3b7251f32ffa84dbdfd0448faf248c306ca808

It's never anything except nil, and it unnecessarily complicates
the implementations.

Test: m -j checkbuild
Change-Id: I021c7971ede3e11bbe08cf1601f4690ed4d1a036

Change module factories from returning a blueprint.Module and a list
of property structs to returning an android.Module, which holds the
list of property structs.

Test: build.ninja identical except for Factory: comment lines
Change-Id: Ica1d823f009db812c518f271a386fbff39c9766f

The "required" field within "phony" module in .bp file has to be
non-empty. And "phony" module doesn't contain any "src" files.
Bug: b/32981153
Test: make -j out/soong/build.ninja

Change-Id: Iaa2009467c44702572b97ca9cbd02c1d368c8d83